英语翻译Astronomershavewitnessedthebiggestbangsincethebigbang—themomentabout15billionyearsagowhentheuniversewascreatedinamassiveexplosion.Thehugeburstofenergyfromtheedgeoftheuniverseisestimatedtobesecondo

　　英语翻译

　　Astronomershavewitnessedthebiggestbangsincethebigbang—themomentabout15billionyearsagowhentheuniversewascreatedinamassiveexplosion.Thehugeburstofenergyfromtheedgeoftheuniverseisestimatedtobesecondonlytothemomentofcreationinitsexplosiveforce,releasingmoreenergyintwosecondsthanthesunwillgiveoutinitlifetime.Scientistshopetheexplosion—knownasagamma-rayburstbecauseitemitsenergyintheformofgammaradiation—willshedlightontheearlieststagesintheevolutionofthestarsandgalaxies.Gamma-rayburstscannotbeseenbythehumaneye,butiftheycouldtheskywouldlightuplikeacameraflasheachtimetheyoccurred.Theyarebyfarthemostenergeticeventsintheuniverseand,untilnow,haveremainedlargelyamystery.

　　Thelatestgamma-raybursttobedetectedaccuratelyoccurredlastDecember.Usinganetworkoftelescopesandsatellites,theastronomerswereabletocalculateitsdistancefromEarthatabout15billionlightyears.Thismeansitmusthavehappenedsoonafterthebigbangitself,whiletheintensityoftheradiationrevealedittobethebiggestbangrecordedbyman.ScientistsfromtheAmericanNationalAeronauticsandSpaceAdministrationandtheCaliforniaInstituteofTechnologyaretoannouncedetailsoftheiranalysisthisweek.ThehugedistancebetweenthesourceoftheexplosionandtheEarthsuggestsgamma-rayburstsareupto10timeslargerthanpreviouslythought,saidJonathanKatz,professorofphysicsatWashingtonUniversityinStLouis.

　　“Gamma-rayburstsmaybethemostdistantthingswewilleverseeandassuchwillactasbeaconstoprobeintotheverydistantregionsoftheuniversewhenstarsandgalaxieswerefirstformed.”

　　AmericanspysatelliteslookingfortheradiationreleasedfromSovietnucleartestsfirstdetectedgamma-rayburstsin1967butthedetailswerekeptclassifieduntil1973.Fornearly25yearsscientistswerehamperedintheireffortstofindanexplanationforthehugeexplosionsbecausetheylastednolongerthanafewseconds.Theinabilitytoexplainthemledtospeculationthatgamma-rayburstsweretheremnantsofnuclearbattlesbetweenaliencivilizations,oreventheexhaustenergyofextraterrestrialspaceshipsgoingintowarpdrive.Twosatellite